Extended Tcl (TclX), is a set of extensions to Tcl, the Tool
Command Language invented by Dr. John Ousterhout of the University
of California at Berkeley. Tcl is a powerful, yet simple embeddable
programming language. Extended Tcl is oriented towards Unix system
programming tasks, with many additional interfaces to the Unix
operating system, It is upwardly compatible with Tcl. You take
the Extended Tcl package, add it to Tcl, and from that you get
Extended Tcl.
TclX seems abandoned by its original authors, but the maintainers of TclPro
made TclX-8.3 available last year. There is not a whole lot of changes, and
most of them deal with the Windows parts of the thing, but here is the upgrade
8.3 anyway. Please, test...
Make sure the shared library is explicitly linked with -lm. On some
occasions, this prevent it from being loaded properly, even though other libs
already loaded already bring in -lm. I don't understand the rtld :(